Method of manufacturing screws.



L. W; ANDiEB SEN. METHOD OF MANUFACTURING SCREWS.

APPLICATION FILED JULY I8, I9I3.

Patented'luly 6, 1915 4 wum w .lLl ANN vlid. i-L Renols. .ALL uslliloLAURITZ l lT. ANDEESEN', 03E WATER-BURY, CONNECTICUT, ASSIGNUfi 36 THEPLUME do ATWUQD IVIATSYUJEAGTURING- COMPANY, OF 'i IInTElItBURY,GONNECTECUT, A 430E1 0- METHOD MANUFI LCCFJUEKING SGREWE.

Application filed July 18, 1913.

To all whom it may concern Be it known that l, LAnnrrz W. ANDER- SEN, acitizen of the United States, residing" at Vi eterbuI-y, in the countyof New Haven and State of Connecticut, have invented a new and usefulImprovement in lriethods of Manufacturing Screws, of which the followingis a specification.

This invention relates generally to screws and more particularly to thatclass oi screws employed in the assemblage of fix tures either electriclight gas or vapor, and more especially the invention relates to themethod or manner of manufacturing said screws.

The object of my invention is to provide an exceedingly simple andeasily practised method. whichwill effect a very considerable saving" ofmsterial and also time and labor in the manufacture of this class ofscrews, Heretofore these screws have been made from a piece of rod metalof uniform dia h eter throughout, said diameter correspond ing with thehead of the screw to be formed and this screw has usually been made bycutting and in such operation e considerable portion of the rod was cutaway, there by consuming considerable time in the cutting: operation andat the same time wasting all that portion of the rod which. was cut awayin forming the thread and heed.

With my invention I avoid these objections by employing a piece of wirethe diameter of which is the diameter of the finished screw, the head ofsaid screw being formed by heading up the end of wire in suitable dies,the thread being rolled noon the wire after the heading operation hasbeen completed 1 My invention also embodies the employment of a washerit the juncture of the heed and screw nortions and my invention embodiescertain other features hereinafter more fully described and pointed outin the claims.

in the drawin s forming a of this specification: Figure is e detailperspective view of section of rod heretofore enrployed for theproduction oi"? ordinary Specification of Letters Patent.

cut screw. Fig 2 is detail view of the screw cut from the stockillustrated in Fig. 1. Fig. 3 is a detail perspective View of niece ofwire stock from which my int proved construction of screw ismanufactured. Fig". 4-5: is a view of said wire stock fter the firstoperation thereon said operation consisting; in punching or heading; upthe head or" screw. Fig. 5 is a detail View of washer employed inconnection with the structure illustrated in Fig. i. Fig. i5 is anelevation partly in section showing the washer swuged or otherwise fixedupon the heeded stock. Fig. 7 is a detail view of the finished screw.

in carrying out my invention I employ a piece of wire stock A, one endof which is headed up in suitable dies to provide the head B andshoulder C. Upon this headed wire ll place the washer l3 ssid washerbeing securely lined by swaging or any other process in order tosecurely fasten the said washer thereon providing a suitable collar orshoulder at the proper point. lhe mute rial thus treated is thensubjected to thread rolling process and the thread E rolled upon thewire completing" the screw which is exactly the same as the screwmanufactured by the screw cutting process heretofore described,beingequally as strong and eiiicient.

By means of my method s very greet saving in metal is accomplished andthe method of manufacture is also economical. as to time and cost ofproduction.

Furthermore by means of my process ll am able to quickly and easilymanufacture screws with varying types of heads and collars which couldnot be accomplished by the cutting process except at a very great cost.

It will thus be seen that I provide it novel construction of screw madeby a novel method and which accomplishes all oi the objects andovercomes the objections hereinbetore referred to.

What ll claim is:-v

l. The herein described method of smelt ing screws which consists inenlarging", one of wire stock and providing or heed, swaging e washer orcollar upon said stoclr Q mews? fixed upon the shank and against theshoulder, as set forth.

LAURITZ W. ANDEBSEN.

Witnesses C. W. NORTHROP, A. J. Sronz.

